In the ever-increasing need and awareness for health and safety, water has become a focus point for proper disinfection treatment as aftereffects of industrialization can become a danger for contamination of water via direct contact. Water is a critical control point of contact where proper treatment can greatly reduce these microbes, thereby reducing the chances of illness and pollution.  

While traditional ORP meters are hard to get or use, this Analog ORP Meter is a highly compact ORP monitoring system that fits into your Arduino. This design configuration allows the user to accurately monitor ORP without having to add any additional circuitry or components to your design. Communication with the Analog ORP Meter is done using only simple wiring and programming. You may also check Liquid Sensor Selection Guide to get better familiar with our liquid sensor series.

ORP (Oxidation-Reduction Potential) is a measure of the ability of oxidation and reduction of the aqueous solution, characterization of oxidizing or reducing the relative degree. Unlike a pH measurement that follows a logarithmic curve and therefore requires more calibration adjustments, ORP follows a linear relationship and does not need instrument adjustment as much as it needs electrode maintenance. ORP has proven to be a reliable method of measuring water quality and provides the operator with a single value of measurement regardless of which product, commodity, operation, treatment, or sanitizer is used, and regardless of varying field conditions or methods by which chemical is applied.  

Attention：

The bottle cap of the probe contains protective liquid (3.3mol/L KCL). Even if the bottle cap is screwed tightly, some protective liquid may still leak around the bottle cap, forming white crystals. But as long as there is still protective liquid in the bottle cap, it will not affect the life and accuracy of the probe. So please use it with confidence. It is recommended that the white crystals be poured back into the protective liquid in the bottle cap.

• Water Quality Testing
• Aquaculture
• Marine Science
• Hydroponic Gardening
• General Chemistry

• Module Power:+5.00V
• Module Size: 40mmX27mm(1.57"x1.06")
• Measuring Range:-2000mV—2000mV
• Suitable Temperature:5-70℃
• Accuracy:±10mv (25 ℃)
• Response Time:≤20sec
• ORP Probe with BNC Connector
• PH2.0 Interface(3 foot patch)
• Zero calibration button
• Power Indicator LED

Project 1. Build KnowFlow: automatic water monitor

KnowFlow is the name of this water quality monitoring device, based on Arduino Uno. It can automatically monitor 5 parameters of water: pH, Temperature, Dissolved Oxygen, Electronic Conductivity, ORP.

• Central Control Unit: Arduino Uno (DFRobot Bluno in this case) and Expansion Shield (DFRobot Expansion Shield V7.1 in this case)
• Water Sensors: pH (pH probe and pH circuit board); EC (EC probe and EC circuit board); ORP (ORP probe and ORP circuit board); Temperature (temperature probe and temperature circuit board); Dissolved Oxygen (DO probe, BNC and circuit board); real time clock circuit board
• Data Storage: Micro-SD module, Micro SD card
• Fit and fix: mounting plate, water proof box( 200mm_150mm_75mm), water proof joint
• Other parts: Cables (Wires), bread board, bolts and nuts, screws, battery, double-sided adhesive, write on tape, small wrench, spiral cable wrap

Project 2. ORP Water Quality Detector Creating Charts in Google Sheets

Introduction: Track the water quality of different sources by location via SIM808 to avert the detrimental effects of water pollution on the immune system.

• Product WiKi
• Schematic
• ORP Meter PCB Layout
• Arduino sample code
• ORP Composite Electrode Manual

• ORP probe (BNC connector) x1
• ORP probe circuit board x1
• Analog cable x1